Installation and User's Guide

The exclude.dir option is not valid for a mounted virtual volume if the volume isbacked up as a file space. The exclude.dir option is valid for a mount point that isbacked up.Back up Microsoft Dfs rootIf you perform an incremental backup of Microsoft Dfs root withdfsbackupmntpnt=yes specified, Tivoli Storage Manager backs up only the junctionpoints, not the subtree under the junctions.If you want to traverse the Dfs tree and back up the files and subdirectories of anyjunction it encounters, specify the dfsbackupmntpnt=no option. If you want tobackup both the Dfs tree structure and the date contained in the Dfs tree you mustrun two backups: one with dfsbackupmntpnt=yes and one withdfsbackupmntpnt=no.This option has no effect if you are backing up individual junctions. Theexclude.dir option behavior for Dfs junctions is same as for mounted virtualvolumes.Note: If a Dfs root is added or modified, Tivoli Storage Manager will not back itup. You must specify the Dfs root in the domain option in the client options file(dsm.opt) regardless of whether DOMAIN ALL-LOCAL is specified.Incremental-by-DateAn incremental-by-date backup backs up new and changed files with amodification date later than the date of the last incremental backup stored at theserver, unless the files are excluded from backup by an exclude statement.If an incremental-by-date is performed on only part of a file system, the date of thelast full incremental is not updated, and the next incremental-by-date will back upthese files again. Use the query filespace command to determine the date and timeof the last incremental backup of the entire file system.To perform an incremental-by-date backup, use the incrbydate option with theincremental command.Unlike a full incremental, an incremental-by-date does not maintain current serverstorage of all your workstation files for the following reasons:v It does not expire backup versions of files that are deleted from the workstation.vvvIt does not rebind backup versions to a new management class if themanagement class has changed.It does not back up files with attributes that have changed, unless themodification dates and times have also changed.It ignores the copy group frequency attribute of management classes.For these reasons, if you have limited time during the week to perform backups,but extra time on the weekends, you can perform an incremental-by-date backupon weekdays and a full incremental backup on weekends to maintain currentserver storage of your workstation files.If the incremental command is retried because of a communication failure orsession loss, the transfer statistics will display the number of bytes Tivoli Storage574 IBM Tivoli Storage Manager for Windows Backup-Archive Clients: Installation and User's Guide